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US7665281B2 - Machine for making packaging with form-fit connection - Google Patents

Machine for making packaging with form-fit connection Download PDF

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Publication number
US7665281B2
US7665281B2 US11/181,037 US18103705A US7665281B2 US 7665281 B2 US7665281 B2 US 7665281B2 US 18103705 A US18103705 A US 18103705A US 7665281 B2 US7665281 B2 US 7665281B2
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US
United States
Prior art keywords
packaging
lid
tray
embossing means
connection element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active, expires
Application number
US11/181,037
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US20070012708A1 (en
Inventor
Dietmar Send
Peter Riegger
Joachim Wokurka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GEA CFS Germany GmbH
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CFS Germany GmbH
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Publication date
Application filed by CFS Germany GmbH filed Critical CFS Germany GmbH
Priority to US11/181,037 priority Critical patent/US7665281B2/en
Assigned to CFS KEMPTEN GMBH reassignment CFS KEMPTEN GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RIEGGER, PETER, SEND, DIETMAR, WOKURKA, DR. JOACHIM
Assigned to CFS GERMANY GMBH reassignment CFS GERMANY GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CFS KEMPTEN GMBH
Priority to US11/609,637 priority patent/US20070138192A1/en
Publication of US20070012708A1 publication Critical patent/US20070012708A1/en
Application granted granted Critical
Publication of US7665281B2 publication Critical patent/US7665281B2/en
Priority to US12/900,337 priority patent/US20110024439A1/en
Active legal-status Critical Current
Adjusted expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
    • B65B7/28—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by applying separate preformed closures, e.g. lids, covers
    • B65B7/2842—Securing closures on containers
    • B65B7/285—Securing closures on containers by deformation of the closure
    • B65B7/2857—Securing closures on containers by deformation of the closure and the container rim
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B29C65/58—Snap connection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/542—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining hollow covers or hollow bottoms to open ends of container bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D43/00—Lids or covers for rigid or semi-rigid containers
    • B65D43/02—Removable lids or covers
    • B65D43/0202—Removable lids or covers without integral tamper element
    • B65D43/0204—Removable lids or covers without integral tamper element secured by snapping over beads or projections
    • B65D43/0212—Removable lids or covers without integral tamper element secured by snapping over beads or projections only on the outside, or a part turned to the outside, of the mouth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/001—Shaping in several steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8242—Pneumatic or hydraulic drives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B29C66/83221—Joining or pressing tools reciprocating along one axis cooperating reciprocating tools, each tool reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/843—Machines for making separate joints at the same time in different planes; Machines for making separate joints at the same time mounted in parallel or in series
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00018—Overall construction of the lid
    • B65D2543/00064—Shape of the outer periphery
    • B65D2543/0012—Shape of the outer periphery having straight sides, e.g. with curved corners
    • B65D2543/00175—Shape of the outer periphery having straight sides, e.g. with curved corners four straight sides, e.g. trapezium or diamond
    • B65D2543/00194—Shape of the outer periphery having straight sides, e.g. with curved corners four straight sides, e.g. trapezium or diamond square or rectangular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00018—Overall construction of the lid
    • B65D2543/00259—Materials used
    • B65D2543/00296—Plastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
    • B65D2543/0049—Contact between the container and the lid on the inside or the outside of the container on the inside, or a part turned to the inside of the mouth of the container
    • B65D2543/00527—NO contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
    • B65D2543/00537—Contact between the container and the lid on the inside or the outside of the container on the outside, or a part turned to the outside of the mouth of the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00592—Snapping means
    • B65D2543/00601—Snapping means on the container
    • B65D2543/00611—Profiles
    • B65D2543/0062—Groove or hollow bead
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00592—Snapping means
    • B65D2543/00601—Snapping means on the container
    • B65D2543/00675—Periphery concerned
    • B65D2543/00694—Segments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00592—Snapping means
    • B65D2543/00712—Snapping means on the lid
    • B65D2543/00722—Profiles
    • B65D2543/00731—Groove or hollow bead

Definitions

  • the present invention relates to a packaging with a packaging tray, into which a product for packing can be filled and which is closed with a lid, whereby at least one form-fit connection connects the packaging tray with the lid and the connection comprises a first and a second connection means. Furthermore, the present invention relates to a method for the production of a packaging as well as a packaging machine.
  • Items of packaging as a rule comprise a packaging tray, into which the packaging material, for example foodstuff, can be filled. This packaging tray is then closed with an, as a rule, preformed lid.
  • This form-fit connection comprises two connection elements, for example a groove and a tongue, whereby the tongue is introduced into the groove.
  • connection elements are moulded into the lid and into the packaging tray during deep-drawing. Since the lid and the packaging tray must, however, be able to be removed again from the respective deep-drawing die after deep-drawing and one connection element must be able to be introduced into the other, the shape of the connection elements is very greatly restricted with this method.
  • a packaging with a packaging tray into which a product for packing can be filled and which is closed with a lid, whereby at least one form-fit connection connects the packaging tray with the lid and the connection comprises a first and a second connection element, wherein at least one connection element has been moulded at least partially into the packaging after the packaging tray has been closed with the lid.
  • the packaging according to the invention can have an arbitrarily shaped form-fit connection between the lid and the packaging tray. Very great design possibilities of the form-fit connection between the packaging tray and the lid thus arise, so that the force that is required to remove the lid from the packaging tray can for example be adjusted very exactly.
  • the packaging according to the invention can be produced in a straightforward manner and cost effectively.
  • the form-fit connection comprises a first and a second connection means, which engage into one another and thus bring about the form-fit connection.
  • All connection elements familiar to the expert can be considered as connection elements, with which it is possible to achieve a form closure between the packaging tray and the lid.
  • the connection element is a groove and tongue connection or two spherical part-shells which engage into one another.
  • the connection preferably extends parallel to the transport direction of the film web from which the packaging is produced. This embodiment of the present invention simplifies the dies which are required to mould the connection elements of the form-fit connection into the packaging tray and the lid and their arrangement in a packaging machine, respectively.
  • the packaging has at least one, but preferably two or more, form-fit connections.
  • the lid and the packaging tray are preferably sealed to one another in the region of a sealing plane.
  • This sealing is preferably peelable, so that the packaging can be closed again by means of the form-fit connection.
  • a further subject-matter of the present invention is a method for the production of a packaging having a packaging tray and a lid, whereby the packaging tray is closed with the lid, wherein a form-fit connection, which connects the lid with the packaging tray, is subsequently moulded into the packaging.
  • the lid is sealed to the packaging tray before the form-fit connection has been produced.
  • a further subject-matter of the present invention is a packaging machine, which has an embossing means with which a connection element can be moulded into the packaging.
  • This embossing means is preferably mounted so as to be displaceable perpendicular to the direction of transport of the film web, so that it can be brought reversibly into engagement with the packaging tray and the lid.
  • the packaging machine according to the invention preferably works cyclically.
  • the packaging machine according to the invention also preferably has counter-bearings, with which the embossing means cooperate.
  • the connection means of the form-fit connection can be moulded more rapidly and more exactly into the packaging tray and into the lid.
  • the packaging machine according to the invention preferably has a sealing station, in which the lid is sealed to the packaging tray.
  • the embossing means are preferably downstream of the sealing station, in relation to the running direction of the film from which the packaging tray and the lid, respectively, is produced.
  • FIGS. 1 to 4 The invention will be explained below with the aid of FIGS. 1 to 4 . These explanations are merely by way of example and do not restrict the general ideas of the invention. The explanations apply equally to all the subject-matters of the present invention.
  • FIG. 1 shows the packaging according to the invention
  • FIGS. 2A and 2B show two possible embodiments of the form-fit connection
  • FIG. 3 shows the packaging machine according to the invention with the embossing means
  • FIG. 4 shows further details of the embossing means according to FIG. 3 .
  • FIG. 1 shows the packaging according to the invention, which comprises a packaging tray 2 and a lid 3 .
  • a product for packing for example foodstuff, can be placed into packaging tray 2 .
  • Packaging tray 2 is then closed with lid 3 .
  • form-fit connection 4 is moulded into the lid and/or the packaging tray.
  • the form-fit connection is moulded both into lid 3 and into packaging tray 2 .
  • the packaging according to the invention is produced on a packaging machine, whereby the packaging tray and the lid are either placed as ready moulded parts into the packaging machine or are moulded into a plane film web, for example by deep-drawing.
  • the items of packaging are transported inside the packaging machine, preferably cyclically, along the running direction represented by the arrow.
  • form-fit connection 4 is arranged parallel to the running direction of the packaging machine, which considerably simplifies the design of the packaging machine, this being explained in greater detail with the aid of FIGS. 3 and 4 .
  • the lid and the packaging tray are sealed to one another in a peelable manner in the region of the sealing plane before the form-fit connection has been moulded into the packaging.
  • FIGS. 2A and 2B show two possible design shapes of the form-fit connection.
  • FIG. 2A shows a groove tapering to a point, the groove extending into and out of the plane of the paper. Due to the fact that the form-fit connection is moulded into the lid 3 and the packaging tray 2 only after the lid 3 has been placed onto the packaging tray 2 , it is possible to produce shapes of the form-fit connection which were not possible according to the prior art. For example, it was not possible to produce a groove 4 ′′ and tongue 4 ′ in such a pointed fashion depicted in the left-hand representation, without the latter either no longer being able to be removed from the mould or becoming damaged during the fitting together of the lid 3 and the packaging tray 2 .
  • FIG. 2B represents a hemispherical design of the form-fit connection.
  • the expert will understand that it is advantageous for several such spherical form-fit connections to be arranged over the circumference of the packaging tray 2 . Reference is further made to the comments concerning FIG. 2A .
  • FIG. 3 represents the embossing means of the packaging machine according to the invention.
  • the packaging tray (not shown) closed with a lid 2 is transported into the plane of the paper and stopped for a short time in recesses 12 of die 8 .
  • embossing means 5 , 6 which are located on displacement means 9 , 10 , are lowered and displaced to the right or to the left, so that they engage with the packaging and mould the respective connection elements essentially simultaneously into the lid and into the packaging tray.
  • embossing means 5 , 6 cooperate with counter-bearings 7 , which are arranged on die 8 .
  • connection elements of the form-fit connection have been produced, the dies are again moved back and the packages thus completed are transported one cycle onwards.
  • the movement of adjustment elements 9 , 10 is represented by the two double arrows. Due to the fact that the form-fit connections are parallel to the direction of transport of the packaging, die 8 does not have to be designed lowerable, and this represents a considerable design advantage. Embossing means 5 , 6 can be designed heatable.
  • FIG. 4 essentially corresponds to FIG. 3 , whereby in the present case tubes 11 are also represented, with which the displacement of adjustment means 9 , 10 perpendicular to the direction transport of the film web is brought about.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closing Of Containers (AREA)

Abstract

The present invention relates to a packaging with a packaging tray, into which a product for packing can be filled and which is closed with a lid, whereby at least one form-fit connection connects the packaging tray with the lid and the connection includes first and second connection elements. Furthermore, the present invention relates to a method for the production of a packaging as well as a packaging machine.

Description

The present invention relates to a packaging with a packaging tray, into which a product for packing can be filled and which is closed with a lid, whereby at least one form-fit connection connects the packaging tray with the lid and the connection comprises a first and a second connection means. Furthermore, the present invention relates to a method for the production of a packaging as well as a packaging machine.
Items of packaging as a rule comprise a packaging tray, into which the packaging material, for example foodstuff, can be filled. This packaging tray is then closed with an, as a rule, preformed lid. In order to increase the pull-off force of the lid from the packaging tray after the initial opening, it is advantageous for the re-closure capability if at least one form-fit connection is present between the lid and the packaging tray. This form-fit connection comprises two connection elements, for example a groove and a tongue, whereby the tongue is introduced into the groove.
At present, the connection elements are moulded into the lid and into the packaging tray during deep-drawing. Since the lid and the packaging tray must, however, be able to be removed again from the respective deep-drawing die after deep-drawing and one connection element must be able to be introduced into the other, the shape of the connection elements is very greatly restricted with this method.
The problem of the present invention, therefore, was to make available a packaging that does not display the drawbacks of the prior art.
This problem is solved with a packaging with a packaging tray, into which a product for packing can be filled and which is closed with a lid, whereby at least one form-fit connection connects the packaging tray with the lid and the connection comprises a first and a second connection element, wherein at least one connection element has been moulded at least partially into the packaging after the packaging tray has been closed with the lid.
It was extremely surprising for the expert and not to be expected that the packaging according to the invention can have an arbitrarily shaped form-fit connection between the lid and the packaging tray. Very great design possibilities of the form-fit connection between the packaging tray and the lid thus arise, so that the force that is required to remove the lid from the packaging tray can for example be adjusted very exactly. The packaging according to the invention can be produced in a straightforward manner and cost effectively.
According to the invention, the packaging comprises a packaging tray, into which the product for packing can be filled, and a lid. Both the packaging tray and the lid are preferably manufactured from a plastics material and are deep-drawn in each case. At least one, but preferably several, form-fit connections are arranged between the lid and the packaging tray, whereby the form-fit connection is brought about in such a way that the force that is required to detach the lid from the packaging tray is increased. The form-fit connections can be distributed arbitrarily over the circumference of the packaging. Furthermore, the form-fit connections can be combined with a joint, whereby at least one form-fit connection is then arranged opposite the hinge. Furthermore, the form-fit connections can also be used as snap connections for the re-closure of the items of packaging. According to the invention, the form-fit connection comprises a first and a second connection means, which engage into one another and thus bring about the form-fit connection. All connection elements familiar to the expert can be considered as connection elements, with which it is possible to achieve a form closure between the packaging tray and the lid. Preferably, however, the connection element is a groove and tongue connection or two spherical part-shells which engage into one another. The connection preferably extends parallel to the transport direction of the film web from which the packaging is produced. This embodiment of the present invention simplifies the dies which are required to mould the connection elements of the form-fit connection into the packaging tray and the lid and their arrangement in a packaging machine, respectively.
According to the invention, the packaging has at least one, but preferably two or more, form-fit connections.
The lid and the packaging tray are preferably sealed to one another in the region of a sealing plane. This sealing is preferably peelable, so that the packaging can be closed again by means of the form-fit connection.
A further subject-matter of the present invention is a method for the production of a packaging having a packaging tray and a lid, whereby the packaging tray is closed with the lid, wherein a form-fit connection, which connects the lid with the packaging tray, is subsequently moulded into the packaging.
With the method according to the invention, it is possible to produce items of packaging which have arbitrarily shaped form-fit connections between the packaging and the lid. The method according to the invention can be carried out in a straightforward manner and cost effectively.
In a preferred embodiment of the method according to the invention, the lid is sealed to the packaging tray before the form-fit connection has been produced.
A further subject-matter of the present invention is a packaging machine, which has an embossing means with which a connection element can be moulded into the packaging.
This embossing means is preferably mounted so as to be displaceable perpendicular to the direction of transport of the film web, so that it can be brought reversibly into engagement with the packaging tray and the lid.
The packaging machine according to the invention preferably works cyclically.
The packaging machine according to the invention also preferably has counter-bearings, with which the embossing means cooperate. By means of this preferred embodiment of the present invention, the connection means of the form-fit connection can be moulded more rapidly and more exactly into the packaging tray and into the lid.
The packaging machine according to the invention preferably has a sealing station, in which the lid is sealed to the packaging tray. The embossing means are preferably downstream of the sealing station, in relation to the running direction of the film from which the packaging tray and the lid, respectively, is produced.
The invention will be explained below with the aid of FIGS. 1 to 4. These explanations are merely by way of example and do not restrict the general ideas of the invention. The explanations apply equally to all the subject-matters of the present invention.
FIG. 1 shows the packaging according to the invention,
FIGS. 2A and 2B show two possible embodiments of the form-fit connection,
FIG. 3 shows the packaging machine according to the invention with the embossing means and
FIG. 4 shows further details of the embossing means according to FIG. 3.
FIG. 1 shows the packaging according to the invention, which comprises a packaging tray 2 and a lid 3. A product for packing, for example foodstuff, can be placed into packaging tray 2. Packaging tray 2 is then closed with lid 3. After the packaging tray has been closed with the lid, form-fit connection 4 is moulded into the lid and/or the packaging tray. In the present case, the form-fit connection is moulded both into lid 3 and into packaging tray 2. The packaging according to the invention is produced on a packaging machine, whereby the packaging tray and the lid are either placed as ready moulded parts into the packaging machine or are moulded into a plane film web, for example by deep-drawing. In each case, the items of packaging are transported inside the packaging machine, preferably cyclically, along the running direction represented by the arrow. The expert will recognise that, in the present case, form-fit connection 4 is arranged parallel to the running direction of the packaging machine, which considerably simplifies the design of the packaging machine, this being explained in greater detail with the aid of FIGS. 3 and 4. The lid and the packaging tray are sealed to one another in a peelable manner in the region of the sealing plane before the form-fit connection has been moulded into the packaging.
FIGS. 2A and 2B show two possible design shapes of the form-fit connection. FIG. 2A shows a groove tapering to a point, the groove extending into and out of the plane of the paper. Due to the fact that the form-fit connection is moulded into the lid 3 and the packaging tray 2 only after the lid 3 has been placed onto the packaging tray 2, it is possible to produce shapes of the form-fit connection which were not possible according to the prior art. For example, it was not possible to produce a groove 4″ and tongue 4′ in such a pointed fashion depicted in the left-hand representation, without the latter either no longer being able to be removed from the mould or becoming damaged during the fitting together of the lid 3 and the packaging tray 2.
FIG. 2B represents a hemispherical design of the form-fit connection. The expert will understand that it is advantageous for several such spherical form-fit connections to be arranged over the circumference of the packaging tray 2. Reference is further made to the comments concerning FIG. 2A.
FIG. 3 represents the embossing means of the packaging machine according to the invention. The packaging tray (not shown) closed with a lid 2 is transported into the plane of the paper and stopped for a short time in recesses 12 of die 8. As soon as the packaging is located inside recess 12 in a stationary position, embossing means 5, 6, which are located on displacement means 9, 10, are lowered and displaced to the right or to the left, so that they engage with the packaging and mould the respective connection elements essentially simultaneously into the lid and into the packaging tray. During the moulding, embossing means 5, 6 cooperate with counter-bearings 7, which are arranged on die 8. As soon as the connection elements of the form-fit connection have been produced, the dies are again moved back and the packages thus completed are transported one cycle onwards. The movement of adjustment elements 9, 10 is represented by the two double arrows. Due to the fact that the form-fit connections are parallel to the direction of transport of the packaging, die 8 does not have to be designed lowerable, and this represents a considerable design advantage. Embossing means 5, 6 can be designed heatable.
FIG. 4 essentially corresponds to FIG. 3, whereby in the present case tubes 11 are also represented, with which the displacement of adjustment means 9, 10 perpendicular to the direction transport of the film web is brought about.
LIST OF REFERENCE NUMBERS
  • 1 packaging
  • 2 packaging tray
  • 3 lid
  • 4 form-fit connection
  • 4′, 4″ connection elements of the form-fit connection, groove, tongue
  • 5, 6 embossing means
  • 7 counter-bearing
  • 8 die
  • 9, 10 displacement means
  • 11 tube
  • 12 chamber inside die 8

Claims (14)

1. A packaging machine comprising: (a) a sealing station at which a lid is sealed to a plastic film tray that has been deep-drawn from a film web that is transported in a transport direction, and (b) embossing means with which at least one connection element is moulded into a packaging, the embossing means being lowered and displaced laterally, so that when lowered and displaced laterally, the embossing means laterally deforms the tray and the sealed lid essentially simultaneously to form the at least one connection element.
2. The packaging machine according to claim 1, characterised in that the embossing means are mounted so as to be displaceable perpendicular to the direction of transport of the film web.
3. The packaging machine according to claim 2, characterised in that the embossing means cooperate with counter-bearings; and the packaging machines produces a packaging with a packaging tray, into which a product for packing can be filled and which is closed with a lid, whereby at least one form-fit connection connects the packaging tray with the lid and the connection comprises a first and a second connection element characterized in that at least one connection element has been moulded at least partially into the packaging after the packaging tray has been closed with the lid.
4. The packaging machine according to claim 3, characterised in that the embossing means are positioned downstream of the sealing station in relation to the running direction of the film from which the packaging tray and the lid is produced; and the packaging machine produces a packaging with a packaging tray from a plastic film, into which a product for packing is filled and which is closed with a lid, whereby at least one form-fit connection connects the packaging tray with the lid and the connection comprises a first and a second connection element characterized in that at least one connection element has been moulded at least partially into the packaging after the packaging tray has been closed with the lid.
5. The packaging machine according to claim 1, characterised in that the embossing means cooperate with counter-bearings; and the packaging machine produces a packaging with a packaging tray, into which a product for packing is filled and which is closed with a lid, so that at least one form-fit connection connects the packaging tray with the lid and the connection comprises a first and a second connection element characterized in that at least one connection element has been moulded at least partially into the packaging after the packaging tray has been closed with the lid.
6. The packaging machine according to claim 1, characterised in that the embossing means are positioned downstream of the sealing station in relation to the transport direction of the film from which the packaging tray and the lid is produced; and the packaging machine produces a packaging with a packaging tray, into which a product for packing is filled and which is closed with a lid, whereby at least one form-fit connection connects the packaging tray with the lid and the connection comprises a first and a second connection element characterized in that at least one connection element has been moulded at least partially into the packaging after the packaging tray has been closed with the lid.
7. The packaging machine according to claim 1, characterized in that the embossing means are configured to produce an elongated tongue and groove connection element.
8. The packaging machine according to claim 1, characterized in that the embossing means are configured to produce an elongated tongue and groove connection element parallel to the direction of transport of the packaging in the machine.
9. The packaging machine according to claim 1, characterized in that the machine includes a die, which is not lowerable, that receives the packaging.
10. A packaging machine comprising: (a) a die that receives a packaging that is transported in a packaging transport direction from a sealing station at which a lid is sealed to a plastic film tray that has been deep-drawn from a film web that is transported in a web transport direction, and (b) embossing means with which at least one connection element is moulded essentially simultaneously into the tray and the lid of the packaging, the embossing means being lowered and displaced laterally in a direction that is perpendicular to the web transport direction, so that the embossing means laterally deforms an upwardly projecting sidewall of the tray and the sealed lid essentially simultaneously to form an elongated tongue and groove connection element parallel to the packaging transport direction in the machine, such connection element being moulded at least partially into the packaging after the tray has been closed with the lid.
11. The packaging machine according to claim 10, characterized in that the die is not lowered during operation.
12. The packaging machine according to claim 10, characterized in that the embossing means is configured to produce a pointed tongue in the lid and a pointed groove in the tray.
13. The packaging machine according to claim 10, characterized in that the embossing means forms a plurality of form fit connections in a packaging.
14. The packaging machine according to claim 10, characterized in that the embossing means cooperate with counter-bearings arranged on the die.
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